Start learning →

CBSE Class 10 Periodic Classification of Elements — practice questions — page 2

Explore 50 free Periodic Classification of Elements questions in CBSE Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.

Practise Periodic Classification of Elements with Quill →

Periodic Classification of Elements questions and exercises with answers

Showing questions 31–50 of 50.

Why are the noble gases very stable chemically?Read the answer and worked solution →Mendeleev predicted the existence of an element he called eka-silicon, later identified as:Read the answer and worked solution →Upto which element, the Law of Octaves was found to be applicableRead the answer and worked solution →According to Mendeleev's Periodic Law, the elements were arranged in the periodic table in the order ofRead the answer and worked solution →Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?Read the answer and worked solution →An element which is an essential constituent of all organic compounds belongs toRead the answer and worked solution →Which of the following is the outermost shell for elements of period 2?Read the answer and worked solution →Which one of the following elements exhibit maximum number of valence electrons?Read the answer and worked solution →Which of the following gives the correct increasing order of the atomic radii of O, F and N?Read the answer and worked solution →Which among the following elements has the largest atomic radii?Read the answer and worked solution →Which of the following elements would lose an electron easily?Read the answer and worked solution →Which of the following elements does not lose an electron easily?Read the answer and worked solution →Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, AlRead the answer and worked solution →Arrange the following elements in the order of their increasing non-metallic character Li, O, C, Be, FRead the answer and worked solution →What type of oxide would Eka-aluminium form?Read the answer and worked solution →Three elements B, Si and Ge areRead the answer and worked solution →Which of the following elements will form an acidic oxide?Read the answer and worked solution →Which one of the following does not increase while moving down the group of the periodic table?Read the answer and worked solution →On moving from left to right in a period in the periodic table, the size of the atom.Read the answer and worked solution →Which of the following set of elements is written in order of their increasing metallic character?Read the answer and worked solution →

Worked practice questions

Why are the noble gases very stable chemically?

  1. They are radioactive
  2. They have completely filled valence shells
  3. They are denser than air
  4. They have negative electron affinity
Show answer and solution

Correct answer: B. They have completely filled valence shells

1. Noble gases occupy Group 18 of the periodic table. 2. They have either 2 (He) or 8 valence electrons. 3. A filled valence shell needs no additional electrons. 4. So they form bonds only under extreme conditions. 5. Hence chemical stability comes from filled valence shells. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

Open this question →

Mendeleev predicted the existence of an element he called eka-silicon, later identified as:

  1. Gallium
  2. Scandium
  3. Germanium
  4. Titanium
Show answer and solution

Correct answer: C. Germanium

1. Mendeleev left gaps in his table for unknown elements. 2. He named them by adding 'eka' (Sanskrit for 'one') to a known element's name. 3. Eka-aluminium was later identified as gallium. 4. Eka-boron turned out to be scandium. 5. Eka-silicon was confirmed as germanium when Winkler discovered it in 1886. 6. So the answer is germanium. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

Open this question →

Upto which element, the Law of Octaves was found to be applicable

  1. Oxygen
  2. Cobalt
  3. Calcium
  4. Potassium
Show answer and solution

Correct answer: C. Calcium

This Periodic Classification of Elements item tests a core Chemistry concept. Correct answer: Calcium. _Source: syllabus Exemplar Science Class 10_

Open this question →

How to practise

  1. Choose a Periodic Classification of Elements question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Periodic Classification of Elements practice for CBSE Class 10. Read explanations as you go. No signup form needed to start.

Practise Periodic Classification of Elements →

More Science topics

Refraction of Light and LensesEffects of Electric CurrentChemical Reactions and EquationsLife Processes in Living Organisms Part 2Life Processes in Living Organisms Part 1Metals and Non-metalsEnvironmental & Disaster ManagementAcids, Bases and Salts